Water-valve for instantaneous water-heaters.



J. ELLIS. WATER VALVE FOR INSTANTANEOUS WATER HEATERS.

' APPLICATION rum; r2128 1912.

"1,049, 29, I PatBIl1 3GdJ3,I1.7, 1Q13.

wnnzsses mvsm'on I Mama/ 1 through the respective exteriorly threaded and rojected bosses 6 and 7 of the casing.-

, UNITED STATES PATENT OFFICE.

JOHN ELLIS, OF PITTSBURGH, PENNSYLVANIA.

WATER-VALVE FOR INSTANTANEOUS WATER-HEATERS.

To all whom, it may concern Be it known that I, JoHN of-the United States, residing at, Pittsburgh, in the county of Allegheny and State of Pennsylvania, ha'veinvented a new and useful-Improvement in Water-Valves for Instantaneous. Water-Heaters, of which improvement the following is a specification. My invention relates to. water-controlhn valves of the class known as automatic, as employed in connection with instantane'ous water heaters, and is adapted to automatically control the water supply to the heater and operate the gas su 1y valve.

The invention has for its 0 ects, to provide a slow actingvalve of the aboveclass,

that will be simple in construction, be of as few parts as possible, and respond under all necessary conditions of servlce.

tion consists in certain novelfeatures of construction, and in certain parts, improve,

ments, and combinations as will be hereinafter fully described and pointed out in the appended claims.

One embodiment of the invention is illustrated in the accompanying drawings in several views, each detail part of the structure being given and referred to by its individual- The interior or chamber portion of the easmg, wherein the valveoperates, is provided with two spaced annular grooves 8 and 9,

respectively, The groove 8 extending about the valve seat, communicates with. the water :inlet and the groove 9, located at the for-- war end of the chamber, communicates with the water outlet, said chamber being furtherprovided with a small pressure port 10 extending from the water inlet to. and terminating in the annular groove 10' atthe rear thereof. Movably fitted within the chamber is a cupshaped piston valve 11 of the same diameter t roughout, the closed end or head thereof being disposed toward Specification of Letters I'acent. Application filed February 28, 1912. Serial No. 680,487.

ELLIS, a citizen With the above objects in view, the inven Patented Jan. 7, 1913.

the rear end 0f the chamber, and is provided with a plurality of spaced ports 12 extending through its annular wall near the head,

the head of the piston being provided with a small leakage port 12. A stem 13 extends out from the interior of the chamber through the stufiing 'box, the inner end 13' of saidstem being at all times inv engagement with the inner surface of the piston head, being so held by the spiral spring 14, said stufling box being provided with suitable stufling 15, a gland 16 and adjusting ca 17.

Normally, the iston va ve occupies the cut off position mdicated in Fig. 2, and

when the device is connected in the water line of the heater, in the usual manner,.'wit h the outer-endof the stem 13 positioned for operating the gas valve of the heater, the

operation thereof would be as follows: Opening of the faucet connected to the water line of the heater "relieves the pressure of 'accu mulated. water on the right or forward end of the piston, thus permitting a gradual increase of water to take place in the chamber portion at the rear or left, through the pressure port 10, the pressure of which acts upon the head of the'plston and causes it to slowly move a sufiicient distance to the right to permit the ports 12 thereof to establish communication with the inlet groove 8, thus allowing free and unrestricted passage of the incoming water to flow into and through the heater to and issue at the service faucet. Upon closure of the faucet, the spring 14 acts upon the piston, forcing it to the. left, the water inthe left or rear end of the chamber being slowly displaced through the small leakage port 12 of said piston to the right of the'chamber, the preponderance of spring and water pressures acting thus upon the right side of the piston slowly returns the same to its normal position where a balance of pressure'is established.

As before stated, the stem of the piston valve is made use of to simultaneously operate the gasvalve of the heater to which the device is applied, the movement of the piston, on opening the faucet, acting upon and opening the'gas supply valve on its outward movement, and on its inward or re.-

.turn' movement permitting closure of the absence of cast ports on such parts a1lowm perfect finishing.

Again, the 7 piston valve, by -reason of it's being, of 'thejsame.

diameter throughout, the 'wear -is equally distributed and any. tendency tounaline and stick is avoided.

fstantaneous-water heaters, the combination of a valve chamber casing havinga water inlet, awater outlet, an annular groove about .the valve seat communicating with the water inlet, a like groove at the forward end of the chamber communicating with the water outlet, and a pressure port extending'between the rear of, the chamber and water inlet, a cup-shaped piston valve arranged within said chamber with its headtoward the rear, end thereof and provided with a plurality of ports formed through its annular wall, and further provided with a 'leakageport communicating with-the water inlet,va stem extending through the forward end of the chamber formovingwith'the v a A In the presence ofpiston valve,'and a spring on said piston stem; 1 r 2. In a Water valve mechanism for'instan taneous water heaters, the combination of inlet, a like groove at the forward end of the chamber communicating with the water outlet, a groove inthe rear end of the chamber.communi cat ing with the water inlet' by a pressure port, a cup-shaped piston valve arranged within said chamber with its head toward the rear thereof and providedwith. va plurality of ports formed through it's annular wall, and further provided with a I leakage port communicating with the water in1et,-a stem extending throughthe forward end of the chamber the-inner end thereof being provided with a head engaging-the piston, and a spiral spring disposed about 3 -said. stem, within the chamber, and engagingwith the head thereof and chamber head. In testimony whereof, I have hereunto signed my name in" the presence of two subscribing witnesses.

JOHN ELLIS.

D. B.'OAKS, .R. S. HARRISON.

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